International Business Machines Corporation

James Carr Suits

Daniel A Nepela

Michael M Farrow

Chien-Jung F Lin

Donald Winston Rice

John G Eckhardt

An optical data storage medium is comprised of a data layer and a reference layer deposited onto a substrate. The data layer material is comprised of a transition metal rich rare earth-transition metal. The data layer has a destruction temperature greater than its Curie temperature. The reference layer is comprised of a transition metal poor rare earth-transition metal. The reference layer material has a Curie temperature greater than the destruction temperature of the data layer material. The result is a magneto-optic medium which may be recorded upon only once.

Write once magneto-optic media and system

Ferromagnetic alloys containing palladium suitable for use in magnetic devices and having improved resistance to corrosion contain from about 20 to 65 atomic percent palladium, up to 80 atomic percent iron and 0 to 55 atomic percent nickel. Magnetic films made of these alloys which contain 20 to 65 atomic percent palladium exhibit a magnetization, 4.pi.M, and a corrosion resistance equal to or better than Permalloy.

Ferromagnetic palladium alloys

Permalloy type alloys containing rhodium suitable for use in magnetic devices and having improved resistance to corrosion contain from about 65 to 90 atomic percent nickel, 10 to 35 atomic percent iron and 1 to 25 atomic percent rhodium. Magnetic films made of these alloys which contain 1 to 10 atomic percent rhodium exhibit magnetic properties similar to Permalloy while having increased resistance to corrosion.

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Saratoga, CA, United States of America

James Carr Suits